﻿namespace Terminal.Gui.Views;

/// <summary>Defines the event arguments for <see cref="TableView.SelectedCellChanged"/></summary>
public class SelectedCellChangedEventArgs : EventArgs
{
    /// <summary>
    ///     Creates a new instance of arguments describing a change in selected cell in a <see cref="TableView"/>
    /// </summary>
    /// <param name="t"></param>
    /// <param name="oldCol"></param>
    /// <param name="newCol"></param>
    /// <param name="oldRow"></param>
    /// <param name="newRow"></param>
    public SelectedCellChangedEventArgs (ITableSource t, int oldCol, int newCol, int oldRow, int newRow)
    {
        Table = t;
        OldCol = oldCol;
        NewCol = newCol;
        OldRow = oldRow;
        NewRow = newRow;
    }

    /// <summary>The newly selected column index.</summary>
    /// <value></value>
    public int NewCol { get; }

    /// <summary>The newly selected row index.</summary>
    /// <value></value>
    public int NewRow { get; }

    /// <summary>
    ///     The previous selected column index.  May be invalid e.g. when the selection has been changed as a result of
    ///     replacing the existing Table with a smaller one
    /// </summary>
    /// <value></value>
    public int OldCol { get; }

    /// <summary>
    ///     The previous selected row index.  May be invalid e.g. when the selection has been changed as a result of
    ///     deleting rows from the table
    /// </summary>
    /// <value></value>
    public int OldRow { get; }

    /// <summary>
    ///     The current table to which the new indexes refer.  May be null e.g. if selection change is the result of
    ///     clearing the table from the view
    /// </summary>
    /// <value></value>
    public ITableSource Table { get; }
}
